Compressed-air motor



No. 748,660. PATENTED JAN.'5, 1904.

' W. SGHLGEMER. CGMPRESSBD A1B. MOTOR. PPLIOATIN 'VLED MAB., 30, 1901.

NO MODEL. 2 SHEETS-SHEET 2.

`lil l l lm able compressor, so as to operate said com- UNITED STATES Patented January 5, 1904.

PATENT OFFICE.

COM PRESSED-AIR MONTOR.

SPECIFICATION forming part of Letters Patent No. 748,660, dated January 5, 1904.

Application filed Marchl 30, 19 0 1 ,To @ZZ wiz/omit may concer/'m y Be it known that I, EDWARD WOLEGAN SCHLOEMER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Compressed-Air Motor,

of which the following is a specification.

This invention relates to improvements in compressed-air motors; and it contemplates the expanding of air compressed by a suitpressor and also the motor; and the object is to provide an apparatus comprising a motor, a compressor, and expanding means for the air so connected and arranged as to utilize the compressed air in the manner above specied.

With the above object in view the invention consists in the novel features of construction hereinafterfully described, particularly pointed out in the claim, and clearly illustrated by the accompanying drawings, in which- Figure 1 is a front elevation of myimproved motor. Fig. 2 is an end view of the' same. Fig. 3 is an enlarged longitudinal section taken through the cylinders. Fig.` 4 is a detail section on the line 4 4 of Fig. 3. Fig. 5 is a detail cross-section on the line 5 5 of Fig. 4, and Fig. 6 is an enlarged section taken through the compression-cylinder.

While I have herein shown an apparatus by means of which my invention may be carried into eect, yet I do not limit myself to the construction herein shown, as the same might be varied in many ways without departing from the spirit and scope of my invention.

Referring now more particularly to the accompanying drawings, A designates a suitabie stand supporting at its upper end motorcylinders B and compressor-cylinder C, which latter is preferably disposed between the two motor-cylinders. The compressor-cylinder O is in the present instance one-fourth the diameter ofY the motor-cylinders. Each of the three cylinders is provided with a piston B', provided with suitable packing and having a piston-rod E, which is movable through a suit- Scrial No. 58 ,662. (No model.)

able stuffing-box F at the lower end of each cylinder. Said' piston-rods are connected to a crank-shaft G,which is mounted in the base.

Each of the motor-cylinders is provided with an inlet-port H, which communicates with passages I, leading to the upper and lower ends of the cylinders, each of said passages being provided with a rotary valve J, which is formed tapered and is provided with a spring K, which tends to force it inwardly and exerts enough pressure to make the same fit snugly to its seat. The valve-stems of valves J are connected by crank-arms L L and pitmen P P with eccentrics M on the shaft G. The arrangement is such that when one of said inlet-valves is opened the other is closed, so as to shut off the entrance of air to one side of the piston while the air is entering upou the other side thereof. Each of the motor-cylinders is also provided with two exhaust-valves N, controlling passages leading from the upper and lower ends of the cylinder to a common exhaust-port, said valves Vbeing operated in the same manner as the valves controlling the inlet of air-namely, by crank-arms L L, pitmen 4P P', operated by eccentrics Q Q upon said shaft G.

`The compressorcylinder is provided with an inlet R,'controlled by an inwardly-opening valve S, and with an outlet T at the same Y end of the cylinder controlled by an outwardly-opening valve U. The outlet T of the compressor-cylinder is connected by pipe D with a tank T2, which tank is connected by a branched pipe 3, extending from its upper end and connected with inlet-ports of each of the motor-cylinders. The tank is also connected with an outletVat the upper end of the compressor-cylinder similar-'to the outlet T at the lower end thereof, and said upper end of the cylinder is also provided with an inlet W, similar to the inlet R. Both inlet W and outlet V are controlled by valves X, the valve of the inlet opening inwardly and the valve of the outlet outwardly.

The tank is provided with any heating means, as Y, for'heating the air compressed therein. Any means may be used for accomheat applied to the tank. This heat expands the compressed air to from four to six times its original pressure.

communicating motion to the driving-shaft( This driving-shaft operates the piston oftheV compressor, which continues the operation of compressing air in the tank. The air in the tank itself is heated by the heating apparatus and used in the cylinders of the motor. The cylinder of the compressor being onefourth in the present instance of the cylinders of the motor will only compress one-fourth of the amount of air used in said motor-cylinders. This compressed air When heated, however, furnishes more than enough power to operate the motor, so that by the heating there is a gain of three-fourths of the power of the motor, said air being regulated to keep a certain pressure.

As before stated, I do not limit my invention to the particular apparatus herein shown and described, as it may be carried into ef,- fect by various forms of motors and compressors; but what I do claim is the arrange- This expanded com`A pressed air is conducted tothe cylinders of i the motor operating the pistons thereof and.

two parallel, longitudinal passage-Ways opening into the cylinder on each side of the pistn, rotary valves in said passage-Ways adjaycent-eachend thereof, a compressor-cylinder of less diameter than the motor-cylinders and arranged between them, a reservoir-tank, a

piston in the compressor-cylinder, pipes leading from each end 'of lthe compressor-cylinder to the tank,',and thence discharging into one of the longitudinal passages of each motorcylinder, an exhaust-pipe leading from the other passage, a cranked shaft, piston-rods connected at one end to the pistons, and at their opposite endsk to the shaft, two eccentrics arranged on the shaft adjacent each motor-cylinder, eccentric-rods extending parallel with each motor-cylinder, oppositely-arranged valve-stems, connected at one end to the valves in one of the passages and at their opposite ends to one of said valve-rods, means for initially compressing the'air in the tank and means for heating the motor-cylinders.

EDWARD WOLFGANG SCHLOEMER. Witnesses:

WALTER J. WILDE, OHAs. RoLorr. 

